The Pirates activated Jones (lat) from the 15-day injured list Tuesday, Noah Hiles of the Pittsburgh Post-Gazette reports.
Jones will rejoin the Pittsburgh rotation Tuesday versus the Cubs after missing nearly two months of action with a Grade 2 right lat strain. The rookie right-hander made three rehab starts at Triple-A Indianapolis and was excellent in his final one, permitting just one hit and one walk over five shutout frames while fanning 10 batters. Jones threw 73 pitches in that outing, so he probably won't be ready for a full workload Tuesday.